* KS4 Science GCSE/IGCSE Chemistry Notes 1. Examples of everyday acid-alkali chemistry at Doc Browns'
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Doc Brown's Chemistry Revision Study Notes
The pH scale of acidity and alkalinity,
acids, alkalis, salts and neutralisation
1.
Examples of everyday acid-alkali chemistry
in the home or industry Revision Notes KS4 Science IGCSE/O level/GCSE Chemistry Information Study Notes for revising for AQA GCSE Science, Edexcel 360Science/IGCSE Chemistry & OCR 21stC Science, OCR Gateway Science (revise courses equal to US grades 9-10) Advanced Level Chemistry Acid-Base Revision Notes - use index GCSE Sub-index: Index of all pH, Acids, Alkalis, Salts Notes 1. Examples of acid-alkali chemistry : 2. pH scale, indicators, ionic theory of acids-alkali neutralisation : 3. pH examples of acid, neutral or alkaline solutions : 4. Acid reactions with metals/oxides/hydroxides/carbonates and neutralisation reactions : 5. Reactions of bases-alkalis like sodium hydroxide : 6. Four methods of making salts : 7. Changes in pH in a neutralisation : 8. Important formulae, salt solubility and water of crystallisation : 9. Further examples of word/symbol equations for salt preparations : 10. More on Acid-Base Theory and Weak and Strong Acids 1. Introducing a few examples of everyday acid-alkali chemistry
The terms used on this page like acid, alkali and pH
are explained in detail in Parts 2. pH scale, indicators, ionic theory of acids, alkalis
(bases) & neutralisation and 3. Examples of
acid, neutral or alkaline
solutions
In
the HOME
You can pre-test the
soil with pH paper and match the colour the paper turns with the pH
number it indicates. These chemicals can be used on a larger scale in farming
and treating acidic rivers and lakes. Bicarbonate or (sodium hydrogencarbonate NaHCO3,
sodium bicarbonate, baking powder)
can be used with sour milk (acidic) for raising action in baking. The acidic
milk reacts with 'Bicarb' to form carbon dioxide gas giving the rising action.
You can easily demonstrate this by adding any common laboratory acid to baking
powder or any other carbonate!
In
the chemical INDUSTRY Sodium hydroxide, one of the most
commonly used alkalis, is used to neutralise aspirin making 'soluble
aspirin'. Aspirin is an organic acid and not very soluble in water,
but,
its sodium salt is much more soluble and is absorbed faster by the
body for more effective treatment. Neutralising
harmful sulphur dioxide gas
(acidic, irritating and toxic SO2) in power station smoke
from burning fossil fuels, by absorbing it in alkaline calcium
hydroxide solution (limewater) to absorb it. Eventually harmless
calcium sulphate solution is formed.
So
all of this is still pretty important chemistry even for the 21st century, with
strong links to agriculture, the environment and leading a stressful
life! Of course there
are 'downsides' to some of this 'acidic' chemistry:
Acid rain increases the rate of
corrosion of stonework (particularly limestone) and metal
structures.
Acid rain makes water too acid for
some aquatic organisms to live and this in turn affects food chains
e.g. salmon do not like water with a pH below 4.5!
Living on Venus could be hard going,
its atmosphere is mainly sulphuric acid,
mind you, you should be ok in
a plastic suit because plastics don't usually react with acids,
which is why, as well as being cheaper, plastics are replacing water
pipes, drain pipes and gutters etc.
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| (spanish) de Química Estudio Notas de revisión La escala del pH de la acidez y la alcalinidad, ácidos, álcalis, sales y neutralización 1. Ejemplos de ácido-álcali química cotidiana en el hogar o la industria 1. Al presentar algunos ejemplos de ácidos y alcalinos química cotidiana * (indonesia) Revisi Studi Kimia Doc Catatan Brown Skala pH keasaman dan alkalinitas, asam, alkali, garam dan netralisasi 1. Contoh asam-alkali kimia sehari-hari di rumah atau industri 1. Memperkenalkan beberapa contoh asam-alkali kimia sehari-hari Istilah yang digunakan di halaman ini seperti asam, alkali dan pH dijelaskan secara rinci dalam Bagian 2. skala pH, indikator, teori ion asam, alkali (basa) & netralisasi dan 3. Contoh asam, netral atau alkali solusi * |
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